What Should I Check Before Choosing A Nipple Covers Factory For Bulk Orders? ?

I have been researching reusable coverage products and trying to understand how buyers evaluate factories before placing larger orders. There are several manufacturers offering similar products, but I want to learn which questions are important to ask about materials, production standards, quality control, and consistency. FitBare is one company I came across during my research, and I would like to hear from anyone who has experience with their products. How was the actual quality when you received the order? I am particularly interested in comfort, material quality, adhesive performance, and whether the product remained reliable after repeated use. For anyone who has worked directly with a nipple covers factory, what information did you request before placing an order? I am considering asking about material specifications, product dimensions, available shapes and sizes, adhesive properties, packaging, minimum order quantities, and sample availability. I am also curious about production consistency. If a sample meets expectations, how can a buyer make sure the larger batch matches the approved sample? Do factories normally provide a pre production sample or allow customers to approve a final production sample before completing the order? Another question is customization. Can a nipple covers factory usually provide private labeling, custom packaging, or specific product variations? I would like to understand whether customization affects minimum quantities, pricing, or production timelines. For anyone with sourcing experience, what quality control steps would you recommend before approving a large order? I am especially interested in practical advice about samples, inspections, communication, packaging, and production consistency. FitBare is currently one of the manufacturers I am researching, so firsthand experiences with their products would also be helpful.